Observe the following tables and find if x and y are directly proportional.
Answers
Observe the following tables and find if X and Y are directly proportional
(i)
x 20 17 14 11 8 5 2
y 40 34 28 22 16 10 4
(ii)
x 6 10 14 18 22 26 30
y 4 8 12 16 20 24 28
(iii)
x 5 8 12 15 18 20
y 15 24 36 45 54 60
Medium
Solution
(i)
40
20
=
34
17
=
28
14
=
22
11
=
16
8
=
10
5
=
4
2
=
2
1
Hence, x and y are directly proportional.
(ii)
4
6
=
8
10
=
12
14
=
16
18
=
20
22
=
24
26
=
28
30
Hence, x and y are not directly proportional.
(iii)
15
5
=
24
8
=
36
12
=
45
15
=
54
18
=
60
20
=
3
1
Hence, x and y are directly proportional.
Step-by-step explanation:
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